I setup my new Air Venturi compressor. I turned on the cooling system and turned on compressor. I watched the temp go to a very high 75 Celsius and turned off compressor. The pump was not pumping water. I pulled pump from water container and examined it. There is a screen on the bottom of pump. On the screesn is a piece of plastic that can be slid back and forth to cover intake hole of pump. It was closing intake and preventing pump from sucking water in. Why would they put something on a pump to close off intake? I slid it back from intake and now pump is working. I just thought I would give a heads up on this problem.